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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1203941
Title:
dahdi-dkms modules not updating properly with kernel updates, can
cause soft lockup
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
This was originally reported in bug #1184154, which was closed because the
originator could no longer contribute.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1184154
From a starting point of 3.2.0-43-generic, dahdi and asterisk are running and
working as expected.
Updating to a more recent kernel (e.g., 3.2.0-44 or 3.2.0-48), via update
manager or manually, results in a system that will not boot. Running the
recovery mode version of the kernel from grub shows that shortly after the
dahdi module is loaded it gets "soft lockup" on the cores and the system stops
booting. I can't enclose logs for this because it doesn't get far enough to
write anything out.
If I fall back to 3.2.0-43 and add module blacklisting and temporarily remove
init.d/dadhi and init.d/asterisk, I can then get 3.2.0-44 to boot since the
dadhi module is no longer loaded.
From that point, I can run "sudo dpkg-reconfigure dahdi-dkms", which appears
to purge the dadhi dkms modules and rebuild them, which is similar to what it
appeared to do when installing the new kernel. If I then undo the hack to
prevent dadhi from loading and reboot into 3.2.0-44, dadhi loads fine without
lockups and asterisk runs as expected.
An objdump compare of modules generated after the kernel install and
after the dpkg-reconfigure show that they're fairly different --
symbols are moved around and of different sizes.
This is easy to reproduce and several people using dadhi have reported
the issue (in the earlier bug report) with kernel versions 3.2.0-44 or
later. I can purge 3.2.0-44 and then re-update to that version and
show that the dadhi modules are causing soft lockups until I do a
"dpkg-reconfigure dadhi-dkms".
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-44-generic 3.2.0-44.69
ProcVersionSignature: Ubuntu 3.2.0-44.69-generic 3.2.44
Uname: Linux 3.2.0-44-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: andre 1838 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf8ff8000 irq 45'
Mixer name : 'Analog Devices AD1988B'
Components : 'HDA:11d4198b,104381f6,00100200'
Controls : 49
Simple ctrls : 26
Date: Mon Jul 22 22:47:20 2013
HibernationDevice: RESUME=UUID=5ff6e571-5a9f-4503-b785-11d535246217
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
IwConfig:
lo no wireless extensions.
eth1 no wireless extensions.
eth0 no wireless extensions.
MachineType: System manufacturer System Product Name
MarkForUpload: True
ProcEnviron:
LANGUAGE=en_CA:en
TERM=xterm
PATH=(custom, no user)
LANG=en_CA.UTF-8
SHELL=/bin/bash
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-44-generic
root=UUID=8a71ba4a-d8d9-4fc8-9dc3-3df31bed8057 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-44-generic N/A
linux-backports-modules-3.2.0-44-generic N/A
linux-firmware 1.79.4
RfKill:
SourcePackage: linux
StagingDrivers: echo
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/30/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1238
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B-Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1238:bd09/30/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-Deluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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